Causality Violation

Causality means the cause of an event is observed before its effect is observed.
'''Causality violation''' means that the cause of an event is observed after its 
effect is observed.
Violation of causality are a problem in [[Distributed System|distributed systems]]
and [[Distributed Algorithm|distributed algorithms]], because causes and causal relations
are essential to any scientific explanation. If the causal structure is unclear,
it is hard to understand a system.